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Dec 6, 2012 8:00am PST
you throw into an arena of ping-pong balls. and if you do that, it will give what? give the energy to ping-pong ball and it itself will slow down. and so what do you do is you take these things and you bounce them off atoms like the size of carbon. did you ever hear about the heavy water? you bounce them off light atoms or molecules and these things will slow down, so they're moderated and will cause the reaction of more of this fission. you call--nuclear fission, gang, breaking apart, nuclear fission, and you will fission more atoms. anyway, this is something that cause an awful lot of excitement. because along with these two, it turns out the kinetic energy of these particles and these, all flying apart, is awesome. the energy that takes to light up new york city comes about as a result of water pouring over niagara falls. and every water drop has an energy of about this much, four electron volts. electron volts are tiny unit of energy. it's microscopic unit of energy, yeah? but four electron volts per water drop, tnt-- [makes sounds] --you get about 30 electron volts. high-octan
Dec 11, 2012 8:00am PST
freezing, would it be radiating energy? yes. would that energy have a frequency? how about i compare that to radiating at two degrees above celsius? would that be radiating energy? would that energy have a frequency? yes. would that frequency be doubled? no. check your neighbor. yeah. ah. hey, gang. would the temperature be-- would the frequency be doubled? get right to that point. get right to that question. the question is: wouldn't that work best for kelvin? yeah. honey, it will only work for kelvin because one degree celsius is not twice as hot as two is-- i should say two degrees celsius is not twice as hot as one degree celsius. see, to say twice as hot is to imply twice the internal energy. try this one. the waitress brings over some coffee because you've ordered coffee with your apple pie, and you say, "oh, i'd like the coffee really hot." and she brings it over, and you put your trusty thermometer in, and, son of a gun, it's iced coffee. ice cubes and everything. it's zero degrees celsius. and you say to the waitress, "no, i know you're busy and all, "but could you give me s
WHUT
Dec 6, 2012 6:00pm EST
international. samantha smith is also with us, leader of the world wildlife fund global climate and energy initiative. kumi naidoo, the two of you held a news conference, along with a few others, which got some attention. you are calling on u.s. climate negotiators to step down. why? >> when president obama made his election victory speech, he broke his silence on climate change, what it would do to america's children. he then subsequently said that he wants to be a global leader on climate change, but the position that has been taken by the united states in these talks is business as usual, has not reflected the urgency of what has just happened in the united states through hurricane sandy, the fact that there is massive drought in many parts of the country itself, and huge climate impacts happening in a world elsewhere. the bottom line is, the politics of the negotiation is out of touch with all the science says, and president obama and other political leaders need to recognize, nature does not negotiate. we have to change. sadly, these negotiators are not reflecting that urgency and the
Dec 13, 2012 3:00pm PST
surgery and chemotherapy. concentrated doses of high-energy particles target the cancerous tissue... killing malignant cells, and stopping their spread. healthy tissues nearby receive only slight doses of radiation, and generally recover quickly. this is particularly true when proton therapy is used. because the stream of positively-charged, subatomic particles can be focused more precisely, there is little damage to surrounding cells. still another approach is to implant tiny radioactive beads within the malignant tissue for several weeks, and then remove them. compared to chemo, everyone sort of feels that radiion is a walk in the park and most of the time, that's true. i found radiation was a pain in the butt because you have to go to the hospital every day, five days a week. you have to go down there, it really doesn't take very long but if somebody's late, if the machine has to cool down, so you can't really gauge your time. it made me really tired, and it... for me, i got a third degree burn underneath my breast where i guess one or two beams intersected. i had an open wound